@delaprd@pavel94 exactly as Suika said - sake from her gourd, watered down. Though, I don't quite understand Miyoi's reaction. She didn't know that it's from Suika's gourd, but knows that it's watered down...strange
As for amfibian slime - refer to Ibarakasen ch.16. Looks like the same thing lives in Suika's gourd
"I like her. I'll tear her limb for limb". The moment you remember oni don't lie with Suika being pretty ambiguous regarding that rule.
Kanako is gorgeous though.